Snake venom factor hemolysis test

The venom factor hemolysis test is a venom factor that can cause hemolysis of complement-sensitive red blood cells through alternate pathways of complement. For the diagnosis of paroxysmal nocturnal hemoglobinuria. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: Positive in paroxysmal nocturnal hemoglobinuria. Tips: Pay attention to rest and keep blood on an empty stomach. Do not wear clothes that are too small or too tight in cuffs to avoid the sleeves being too tight when blood is drawn or the sleeves are too tight after blood draw, causing blood vessels in the arms. Avoid strenuous exercise. Normal value The result of the test was negative. Clinical significance Abnormal results venom factor hemolysis test was positive, can be diagnosed as paroxysmal nocturnal hemoglobinuria. The people who need to be examined have fatigue, dizziness, pale, palpitations, shortness of breath, tinnitus, eye, etc., and people with paroxysmal aggravation or paroxysmal hemoglobinuria. Positive results may be diseases: aplastic anemia in the elderly, paroxysmal nocturnal hemoglobinuria in children Taboo before the test: pay attention to rest, keep blood on an empty stomach. Do not wear clothes that are too small or too tight in cuffs to avoid the sleeves being too tight when blood is drawn or the sleeves are too tight after blood draw, causing blood vessels in the arms. Avoid strenuous exercise. Requirements for examination: Do not tamper with venous blood collection, check is cumbersome, it may take a long time, you need to wait patiently for results. Inspection process Vascular blood collection was used for testing. Before venous blood collection, carefully check that the needle is securely installed and that there is air and moisture in the syringe. The needle used should be sharp, smooth, ventilated, and the syringe should not leak. Firstly, the skin was disinfected from the inside to the outside and clockwise from the selected venipuncture with a 30g/L iodine swab. After the iodine was volatilized, the iodized trace was wiped out in the same way with a 75% ethanol swab. Fix the lower end of the venipuncture site with the thumb of the left hand, hold the syringe syringe with the thumb and middle finger of the right hand, and fix the needle lower seat with the index finger, so that the bevel of the needle and the scale of the syringe are upward, and the needle is inclined along the vein to make the needle and the skin obliquely penetrate the skin at an angle of 30°. Then, through the vein wall, enter the venous cavity forward at an angle of 5°. After seeing the blood return, the needle will be probed into the spot to avoid the needle slipping out when the blood is collected; but it is not possible to use a deep puncture to avoid hematoma, and immediately remove the cuff. Needle plug can only be pumped out, can not be pushed in, so as to avoid injecting air into the vein to form a gas plug, causing serious consequences. Remove the syringe needle and slowly inject the blood into the anticoagulation tube along the tube wall to prevent hemolysis and foam. Not suitable for the crowd Generally no taboos. Adverse reactions and risks Risk of infection: If you use an unclean needle, you may be at risk of infection.

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